Motor-vehicle.



Patented Oct. I4, |902.-

l W. NRRIS. MoTovE'HlcLE. (Appucation medngv. 5, 1901A (No Model.)

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131 Ven for VZZrn eS/.S' Y

UNITED STATE-s PATENT OEEICE.

VILLIAM NORRIS, OF PRESTON, ENGLAND, ASSIGNOR TO T. COULTl-IARD rb COMPANY, LIMITED, OF PRESTON, ENGLAND.

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SPECIFICATION forming part of Letters Patent No., 711,118, dated October 14, 1902.

Application filed November 5, 1901. Serial No.' 81,278. (No model.)

To (If/ZZ whom, it may concern).-

Be itknown that I, WILLIAM NoRRIs, a subject ofthe King of Great Britain and lreland, residing at Cooper road, Preston, England,

have invented certain new and useful lmprovements Relating to-Motor-Vehicles, (for which I have made application for Letters Patent in Great Britain, No. 9,581, bearing date May 1901,) of which the following is a speci- 1o fication.

My invention relates to a compound engine which is particularly well adapted for motorpropelled vehicles. Its object is to provide an improved construction and arrangement of cylinders, piston, and intercepting-valves.

My invention consists in an improved arrangement of cylinders and piston-valves, the cylinder-cover being adapted toact as a steamreceiver, and in improved intercepting and` 2o live-steam-admission valves operating in conjunction with the piston-valves for exhausting the steam from the high-pressure cylin-V and intercepting valve device. Fig. 2 is a ver- 3o tical section of the latter and part of the highpressure cylinder of the engine, showing the live-steam -admission valve open to admit steam to the low-pressure cylinder and the interceptingvalve open to allow exhauststeam from the high-pressure cylinder to escape to the by-pass.

In carrying out my invention as illustrated in Fig. 1 I arrange the high and low pressure cylinders k and In side by side and provide each cylinder with a high and low pressure piston-valve n and o, respectively. I provide the ends of the cylinders and valve-easings remote from the crank-shaft with a hollow cover p, which acts also as a steam-receiver q. A partition-wall r in the hollow cover separates the high-pressure valve-chest from the main part of the steam-receiver q; but communieation between them may be effected through holes s and t, formed in the cover,

5o one on each side of the partition-wall f, and

through the steam-chestu of my interceptingvalve,(to be hereinafter described,) which is secured to the cylinder-cover opposite these holes.

The high-pressure piston-valve n is hollow and open at both ends. It slides within a cylindrical casing fu, provided with ports w and 00, opening into the back and front of the high-pressure cylinder, and holes 2 2 in its cylindrical surface between the ports w and-, 6o which holes 2 2 form communication between the valve-chestand an annularspacearound the body of the piston-valve. The low-pressure valve o is constructed in a similar man ner to the high-pressure valve, but is of somewhat larger size. The manner in which the valves control the steam admission and exhaust will be readily seen by reference to Fig. l, which shows the high-pressure piston just commencingr its forward stroke and the 7o low-pressure piston about the middle of its backward stroke.

'High-pressure steam-enters the high-pressure valve-chest at vthe inlet 4 and passes by holes 2 and the annular space 3 into the 75 steam-port In to the back of the piston 5. The forwardend of the cylinder is now exhausting through the port-x, through the hollow piston-valve n, steam-chest u in the pathindicated' by the arrow 6, whence it passes along 8o the receiver q, through thel'po'rt 7 into the back end of the low-pressure cylinder. Exhaust from the other end of the low-pressure cylinder takes place through the port 8, aroundtheuannular space 9 of the low-pres- 85 sure piston-valve 0 to the exhaust-pipe 11.

When admittinghigh-pressure steam to the forward end of the high-pressure cylinder, steam iows around the annular space 3 into the cylinder by way of the port m, While at 9o the same time the other end of the cylinder is exhausting into the receiver, whence it passes through the hollow piston-valve 0 and port 8 into the forward end of the low-pressure cylinder. Exhaust from the back end of this cylinder then takes place through the port 7, annular space 9 into the exhaustpipell.

It will be observed that by arranging the high-pressure steam-valve in the manner just loo described high-pressure steam is prevented from acting on the stuiing-box 12.

It is sometimes convenient to exhaust the steam from the high-pressure cylinder direct to the atmosphere and to admit live steam to the low-pressure cylinder, and for this purpose I employ a double-faced valve to control a by-pass opening to the atmosphere. This valve serves the double purpose of an intercepting-valve and an emergency-valve. It also controls the admission of live steam to the receiver. In Fig. 1 the valves are shown closed in the manner employed when working the engines as compound; but in Fig. 2 they are shown arranged to exhaust the steam from the high-pressure cylinder to theatmosphere and supply live steam to the low-pressure cylinder. The device consists of a chest u, communicating with the receiver and piston valve-chest by the holes s and t and provided with a partition-wall13, coinciding with the partition rr' of the cylinder-cover. A passage 14 is formed in the partition-Wall 13 of suflicient area to permit the free passage of steam from the high-pressure to the low-pressure cylinder when compounding, and I secure to the valve-chest u, opposite the passage 14, a casting 15, opening to the atmosphere by the pipe 16. Within this casting I guide a combined intercepting and emergency valve 17, having double faces, one of which is adapted to seat against the face 18 of the casting 15 when the engine is compounding and the other against the edge of the passage 14 when exhausting the high-pressure cylinder through the by-pass to the atmosphere. The valve 17 may be operated by a rod 19 in any suitable manner. To admit live steam to the receiver, I provide the valve-chest 'uJ with a steam-inlet 2l, communicating with a valvebox 22, which contains a spring-controlled valve 23, guided within a passage 25, leading to the Valve chest u, by means of vanes formed on an extended rod 24. When the valve 17 is closed to the atmosphere, the spring 26 and the pressure of steam in the valve-box 22 holds the valve 23 closed, as seen in Fig. 1; but when the valve 17 is open to the exhaust by-pass and closes the passage 14 a projection 27, formed on the valve 17, coming into contact with the rod 24, opens the valve 23, thus admitting live steam to the receiver q, as'seen in Fig. 2. I may provide the valve-box 23 with a screwed plug 28 to hold 'the valve 23 tightly against its seat when required. It will be observed that this device renders stuffing-glands entirely unnecessary.

Instead of exhausting into the atmosphere the steam from the by-pass may be led into a feed-water heater.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a compound engine, in combination, a high and a low pressure cylinder with corresponding valve-chests, a cylindrical valvecasing in each chest, .steam-ports between the casings and both ends of their respective cylinders, a hollow piston-valve open at both ends within each casing, an annular space between each valve and each casing, passages in the casings forming communication between the chests and annular spaces, a hollow cover closing the back end of both cylinders, a partition dividing the hollow space of the cover into two portions one of which communicates with the interior of the high-pressure valve and the other communicates with the interior of the low-pressure valve, an intercepting-valve chest fixed to the hollow cover, a steam-passage on each side of the partition communicating with the intercepting-valve chest, an exhaust-steam outlet in the low-pressure valve-casing in direct communication with the annular space, and means for operating the valves, substantially as described.

2. In a compound engine, a high-pressure and a low-pressure cylinder, a steam-receiver adjacent to said cylinder, an interceptingvalve chest communicating with said steamreceiver, ahigh-pressure valve,aby-passlead ing from the high-pressure valve through the valve-chest, a double-faced valve, within the valve-chest, one face of said valve acting as an emergencyvalve, to close the bypass when the engine is compounding and the other face acting as an intercepting-valve to close the passage to the steam-receiver, when the high pressure cylinder is exhausting through the by-pass, means for operating the double-faced valve, a steam-admission Valve, a spring in con tact with said valve, said valve being normally held closed by the spring and the pressure of live steam, and a projecting guide-rod carried by the valves whereby it may be opened by the double-faced' valve when the by-pass is opened.

3. In a compound engine, in combination with a steam-receiver, an intercepting-valve chest,a by-pass from the engine high-pressure valve through the valve-chest to the atmosphere, a passage from the valve-chest to the receiver, a double faced valve within the valve-chest, one face of said valve acting as an emergency-valve to close the by-pass to the atmosphere when the engine is compounding, and the other face acting as an interceptingvalve to close the passage to the steam-receiver when the high-pressure cylinder is exhausting to the atmosphere through the by-pass, means for operating the doublefaced valve, a steam-admission valve normally held closed by a spring and the pressure of the live steam, a projecting guide-rod carried by the latter valve, whereby it may be opened bythe double-faced valve when the by-pass is opened, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

WILLIAM NORRIS.

Witnesses:

GEO. HoDGsoN, THOMAS EocLEs GILL.

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